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JEE Main & Advanced Sample Paper JEE Main Sample Paper-11

  • question_answer
    Number of electrons transfered in each case when \[KMn{{O}_{4}}\] acts as an oxidising agent to give \[Mn{{O}_{2}},M{{n}^{2+}},\] \[Mn{{\left( OH \right)}_{3}}\] and \[MnO_{4}^{2-}\] are respectively

    A)  3, 5, 4 and 1                      

    B)  4, 3, 1 and 5

    C)  1, 3, 4 and 5                      

    D)  5, 4, 3 and 1

    Correct Answer: A

    Solution :

    \[KMn{{O}_{4}}\] \[Mn{{O}_{2}}\] \[M{{n}^{2+}}\] \[Mn{{\left( OH \right)}_{3}}\] \[MnO_{4}^{2-}\]
    O.S. of Mn +7 +4 +2 +3 +6
    Electrons needed 0 3 5 4 1


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